[vsnet-grb-info 21292] GRB 181030A: Enhanced Swift-XRT position
GCN Circulars
gcncirc at capella2.gsfc.nasa.gov
Tue Oct 30 14:17:40 JST 2018
TITLE: GCN CIRCULAR
NUMBER: 23391
SUBJECT: GRB 181030A: Enhanced Swift-XRT position
DATE: 18/10/30 05:16:25 GMT
FROM: Phil Evans at U of Leicester <pae9 at leicester.ac.uk>
A.P. Beardmore, P.A. Evans, M.R. Goad and J.P. Osborne (U. Leicester)
report on behalf of the Swift-XRT team.
Using 2439 s of XRT Photon Counting mode data and 6 UVOT
images for GRB 181030A, we find an astrometrically corrected X-ray
position (using the XRT-UVOT alignment and matching UVOT field sources
to the USNO-B1 catalogue): RA, Dec = 146.92603, +14.65731 which is equivalent
to:
RA (J2000): 09h 47m 42.25s
Dec (J2000): +14d 39' 26.3"
with an uncertainty of 1.7 arcsec (radius, 90% confidence).
This position may be improved as more data are received. The latest
position can be viewed at http://www.swift.ac.uk/xrt_positions. Position
enhancement is described by Goad et al. (2007, A&A, 476, 1401) and Evans
et al. (2009, MNRAS, 397, 1177).
This circular was automatically generated, and is an official product of the
Swift-XRT team.
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